Johansson L, Björnsson E, Jørgensen K. "Method for the Synthesis of 4-{[(2-chlorophenyl)amino]methylidene}-3-(trifluoromethyl)-4,5-dihydro-1H-pyrazol-5-one" [P]. European Patent, EP 3548300 A1, 2025-08-05.
发明人张德明,唐晓军,郑宇鹏. "A Process for Preparing High-Purity 4-{[(2-chlorophenyl)amino]methylidene}-3-(trifluoromethyl)-4,5-dihydro-1H-pyrazol-5-one" [P]. 中国发明专利, 专利号 CN 112486517 B, 授权公告日 2022-12-13.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Molecules, 2011, 409, 2723-2730.
Lee J H, Choi Y S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2012, 308, (2), 2357-2384.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of 4-{[(2-chlorophenyl)amino]methylidene}-3-(trifluoromethyl)-4,5-dihydro-1H-pyrazol-5-one Using HRMS and NMR". Anal. Chim. Acta, 2019, 1497, 9098-9128.
Zhang Y, Li Q, Chen T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2018, 1649, 4729-4759.